Advantages of the construction and materials used in the Grand Piano PETROF 194 Storm
RimPetrof original. Inner rim is laminated solid beech, birch, 12 lamels. Outer rim is from alder-tree, laminated by birch plywood. Total thickness 7 cm. The rim is produced with highest exactness at "CNC machine". The solid construction of the rim of the P 194 Storm grand piano ensures high and long term tuning stability and action regulation as well as sound board crown stability which is a prerequisite for perfect performance.
Frame posts
The rim is reinforced by 4 massive spruce posts. The connection is provided by fish-tail and beech dowels. The frame posts are produced with high exactness at "CNC machine". The frame posts provide a high contour stability of the frame, tuning stability and regulation.
Legs
Petrof original. Solid beech core, solid alder outer lining, gabon counter veneer, outer decorative thin veneer. The robust construction of the legs ensures high stability of the instrument whilst being played.
Iron plate
Czech producer. Gray cast iron, hand worked, drilled at "CNC machine", lacquered. Precise drilling means exact length of strings and creates good conditions for their optimal oscillation and creation of an exact tone. The iron plate, which is of a vivid light gold tint, perfects the modern design of the instrument. It is possible to harmonize the piano design with the design of its surroundings and to produce a piano with silver metal parts.
Hardware fittings
Petrof original. Solid brass, polished, lacquered. Hardware fittings are corrosion resistant, therefore they do not require any maintenance.
Pinblock
Special beech plywood type Multiplex. Original veneer thickness 2 mm compressed to the density 800 - 850kg/m3 (= 6 veneer layers/cm), high moisture resistant glue. The pinblock in this grand piano has a high resistance against atmospheric changes (e.g. humidity). It provides equal torque of tuning pins, which results in a particularly high stability of tuning.
Soundboard
Petrof original. The soundboard is made from European mountain spruce. It has a spheric crown and is shaped into wedge block. Thickness 9 mm in the center, tapered to 7 mm (in bass and front part). Traditionally shaped sound board gives high acoustic performance in all frequencies of the whole range. Its construction greatly contributes to generating the typical tone of PETROF grand pianos. The P 194 Storm grand piano is able to fill a smaller hall.
Ribs
Petrof original. The ribs are made from European spruce and are symmetrically circular shaped. The ends are fitted. The cross rib is produced from beech, is straight and is machined at "CNC machine". Traditionally shaped, very exactly worked ribs from European spruce supports a spheric crown of the sound board.
Bridges
Petrof original. Treble - solid beech, hornbeam cap, genuine ebony descant cap. Bass - solid beech, hornbeam cap (with a foot bridge). Bridges graphite coated, hand notched and bored. The construction of the bridges and materials are comparable in quality with the highest class piano bridges. The hornbeam and genuine ebony used in the treble bridge minimize dumping of the highest tones and the highest frequencies, enable better transmission onto the sound board. The high and highest tones sound more clearly and longer.
Scale
Agraffes, front and rear tuned duplexes. Single hitch pinning. The construction of agraffes and duplexes are fully comparable to the world class grand pianos. The single hitch pinning provides better tuning stability, simpler exchange of strings. The duplexes enrich a colour of tones.
Strings & Tuning pins
Steel wire Mapes USA, Röslau Germany. Copper Degen Germany. Longest string 1410 mm. Steel, nickeled. Strings used in the P 194 Strom grand piano are made from string wire of the world's best quality. The tuning pins are of the best quality and they are corrosion resistant.
Hammer heads
Abel Germany, walnut or hornbeam mouldings. Abel premium under felt and top felt. Hammer heads Abel, which are fitted in this grand piano, are some of the best worldwide. They enable the player to get a great variety of tones.
Dampers
Petrof, hornbeam heads. Felt Laoureux France. The felt, manufactured by French company Laoureux, is a guarantee of the highest quality proved by generations.
Action
Petrof original action. Wippen rail aluminum. Hammer rail aluminum. Hornbeam action parts. The PETROF action is quick, with good repetition, it enables the grand piano Storm to be played confidently, even technically demanding passages, and to have full control of creating tones. Specifically profiled aluminum action rails are very stable also in changing humidity.
Keys
Petrof original. European spruce, white and black acrylic tops – Polyplex Sweden. Individually balanced keys. Grand piano P 194 Storm has keys of European origin, each key is individually balanced. The quality is proven by more than 140 years of production tradition.
Key bed
Petrof original. Spruce sandwich board, beech veneered. Solid beech insert in lyre and legs zone. Thickness 47 mm. Robust key bed of the STORM grand piano is of the same construction as in master concert instruments. It ensures regulation stability of this grand piano's action as well as stability of the whole instrument while being played dynamically.
Pedals
3 pedals, solid brass. The construction, materials and function of P 194 Storm's pedals are comparable in quality with the highest class pianos´ pedal mechanisms.
